<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		.box{
			width: 200px;
			height: 200px;
			background-color: pink;
			margin: 50px auto 100px; 
		}
	</style>

</head>

<body>
	<div class="box"></div>
</body>
</html>